The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 2010
Filed:
Sep. 25, 2007
Shinichi Komine, Saitama, JP;
Shinichi Komine, Saitama, JP;
Citizen Holdings Co., Ltd., Tokyo, JP;
Abstract
The measurement of the characteristic of the piezoelectric element of the oscillation device, particularly, the equivalent serial resistance value can be carried out without using a measurement device connected to the outside. An oscillation device causes oscillation by driving a piezoelectric element by means of an oscillation circuit, the equivalent serial resistance value of the piezoelectric element is determined on the basis of the voltage-current relationship between the output signal of the oscillation circuit of the oscillation device and the drive signal used when the oscillation circuit drives the piezoelectric element. The oscillation device has a piezoelectric element, an oscillation circuit that drives the oscillation of the piezoelectric element through feedback of the drive signal to the drive terminal of the piezoelectric element, and a drive signal switch circuit that controls the external output of the drive signal of the oscillation circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile